RESONANCE 2023

Session

11 juil. 2023 à 10:40

Toulouse

Présidents de session

Survishno 1 / Model & System identification

• Simon CHESNE (LaMCoS INSA-Lyon)

Liste des contributions Ordre du jour

256. "SYSID#1 - Comparative study of the first bending modes of a cantilever beam from a video measurement"

Touzet Jimmy

11/07/2023 10:40

Today, there is a real interest in using video cameras for operational modal analysis or preventive maintenance applications rather than using traditional sensors. Indeed, the video camera allows a non-intrusive diagnosis and allows a synchronous measurement of displacement and deformation, all with few cables and equipment. The potential of video-based vibration monitoring is all the more...

257. "SYSID#2 - Harmonic Modal Analysis Using Hydroelectric Runner Steady-State Strain Gauge Measurements"

Morin Nicolas

11/07/2023 11:00

Hydroelectric turbine runners' fatigue life is reduced by more recurrent off-peak operations induced by the integration of wind and solar energy sources to the power grid. This increase in fatigue degradation entails the need for a better comprehension of runners' dynamic loadings and responses. This needed knowledge includes a more accurate prediction of runners' modal characteristics and...

258. "SYSID#3 - Identification of the Payne effect in a viscoelastic material coupling Bayesian identification and Digital Twin"

Jaboviste Kévin

11/07/2023 11:20

The Payne or Fletcher-Gent effect is a particular behavior occurring in viscoelastic materials containing fillers. It induces a nonlinear dependency of the viscoelastic storage modulus on the amplitude of the applied strain. This amplitude dependency must be taken into account in engineering applications as it does change the elastodynamic behavior of the overall structure integrating the...

259. "SYSID#4 - Parametric modal testing using slow but continuous variation of operating conditions. Illustration on a contact bench."

Malacrida Alves Guilherme

11/07/2023 11:40

Several systems have vibration properties, modes and non-linear limit cycles, that are significantly affected by environmental properties such as temperature, pressure, rotation speed, ... The classical testing strategy is to select a number of fixed operating conditions, wait for the system to stabilize at each condition and extract the vibration characteristics once stabilized. A lot of test...

260. "SYSID#5 - Estimation of the piezoelectric factor in nonlinear transducers"

Peyrouse Floriane

11/07/2023 12:00

This study focuses on the characterisation of non-linear and piezoelectric systems. The behaviour of a structure displaying a geometric elastic nonlinearity and coupled to piezoelectric elements is explored. The elaboration of piezoelectric transducers is based on the maximization of their coupling factor to ensure optimal performances. The measurement of the coupling factor is thus a key step...

261. "SYSID#6 - Design of a Resonant Plate for Pyroshock Testing based on Shape and Size Heuristic Optimization"

Viale Luca

11/07/2023 12:20

Resonant plate testing is a common laboratory test method for qualifying space equipment which needs to withstand strong high-frequency shocks, usually activated by pyrotechnic devices and transmitted to the structure. Given their impulsive nature, shocks could critically damage onboard equipment and jeopardize the success of the mission. NASA-STD-7003A international standards are usually...